 /*******************************************************************************
  * Copyright (c) 2000, 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  * Sebastian Davids <sdavids@gmx.de> - Images for menu items (27481)
  *******************************************************************************/
 package org.eclipse.ui.views.navigator;

 import org.eclipse.core.resources.IResource;
 import org.eclipse.jface.action.IMenuManager;
 import org.eclipse.jface.viewers.IStructuredSelection;
 import org.eclipse.jface.viewers.TreeViewer;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.dnd.Clipboard;
 import org.eclipse.swt.events.KeyEvent;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.ui.IActionBars;
 import org.eclipse.ui.ISharedImages;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.actions.ActionFactory;
 import org.eclipse.ui.actions.DeleteResourceAction;
 import org.eclipse.ui.actions.TextActionHandler;

 /**
  * This is the action group for refactor actions,
  * including global action handlers for copy, paste and delete.
  *
  * @since 2.0
  */
 public class RefactorActionGroup extends ResourceNavigatorActionGroup {

     private Clipboard clipboard;

     private CopyAction copyAction;

     private DeleteResourceAction deleteAction;

     private PasteAction pasteAction;

     private ResourceNavigatorRenameAction renameAction;

     private ResourceNavigatorMoveAction moveAction;

     private TextActionHandler textActionHandler;

     public RefactorActionGroup(IResourceNavigator navigator) {
         super(navigator);
     }

     public void dispose() {
         if (clipboard != null) {
             clipboard.dispose();
             clipboard = null;
         }
         super.dispose();
     }

     public void fillContextMenu(IMenuManager menu) {
         IStructuredSelection selection = (IStructuredSelection) getContext()
                 .getSelection();

         boolean anyResourceSelected = !selection.isEmpty()
                 && ResourceSelectionUtil.allResourcesAreOfType(selection,
                         IResource.PROJECT | IResource.FOLDER | IResource.FILE);

         copyAction.selectionChanged(selection);
         menu.add(copyAction);
         pasteAction.selectionChanged(selection);
         menu.add(pasteAction);

         if (anyResourceSelected) {
             deleteAction.selectionChanged(selection);
             menu.add(deleteAction);
             moveAction.selectionChanged(selection);
             menu.add(moveAction);
             renameAction.selectionChanged(selection);
             menu.add(renameAction);
         }
     }

     public void fillActionBars(IActionBars actionBars) {
         textActionHandler = new TextActionHandler(actionBars); // hooks handlers
 textActionHandler.setCopyAction(copyAction);
         textActionHandler.setPasteAction(pasteAction);
         textActionHandler.setDeleteAction(deleteAction);
         renameAction.setTextActionHandler(textActionHandler);

         actionBars.setGlobalActionHandler(ActionFactory.MOVE.getId(),
                 moveAction);
         actionBars.setGlobalActionHandler(ActionFactory.RENAME.getId(),
                 renameAction);
     }

     /**
      * Handles a key pressed event by invoking the appropriate action.
      */
     public void handleKeyPressed(KeyEvent event) {
         if (event.character == SWT.DEL && event.stateMask == 0) {
             if (deleteAction.isEnabled()) {
                 deleteAction.run();
             }

             // Swallow the event.
 event.doit = false;

         } else if (event.keyCode == SWT.F2 && event.stateMask == 0) {
             if (renameAction.isEnabled()) {
                 renameAction.run();
             }

             // Swallow the event.
 event.doit = false;
         }
     }

     protected void makeActions() {
         TreeViewer treeViewer = navigator.getViewer();
         Shell shell = navigator.getSite().getShell();
         clipboard = new Clipboard(shell.getDisplay());

         pasteAction = new PasteAction(shell, clipboard);
         ISharedImages images = PlatformUI.getWorkbench().getSharedImages();
         pasteAction.setDisabledImageDescriptor(images
                 .getImageDescriptor(ISharedImages.IMG_TOOL_PASTE_DISABLED));
         pasteAction.setImageDescriptor(images
                 .getImageDescriptor(ISharedImages.IMG_TOOL_PASTE));

         copyAction = new CopyAction(shell, clipboard, pasteAction);
         copyAction.setDisabledImageDescriptor(images
                 .getImageDescriptor(ISharedImages.IMG_TOOL_COPY_DISABLED));
         copyAction.setImageDescriptor(images
                 .getImageDescriptor(ISharedImages.IMG_TOOL_COPY));

         moveAction = new ResourceNavigatorMoveAction(shell, treeViewer);
         renameAction = new ResourceNavigatorRenameAction(shell, treeViewer);

         deleteAction = new DeleteResourceAction(shell);
         deleteAction.setDisabledImageDescriptor(images
                 .getImageDescriptor(ISharedImages.IMG_TOOL_DELETE_DISABLED));
         deleteAction.setImageDescriptor(images
                 .getImageDescriptor(ISharedImages.IMG_TOOL_DELETE));
     }

     public void updateActionBars() {
         IStructuredSelection selection = (IStructuredSelection) getContext()
                 .getSelection();

         copyAction.selectionChanged(selection);
         pasteAction.selectionChanged(selection);
         deleteAction.selectionChanged(selection);
         moveAction.selectionChanged(selection);
         renameAction.selectionChanged(selection);
     }

 }

